How to find prime of Big integer number?

[karimkhan]

I want to find all the prime number less then some given big integer number.

like

BigInteger n=new BigInteger(jTex tField1.getText ());
then all prime number less then n.

While I tried it was giving error the increment and comparison operator can not be applied to BigInt..

for (i=1;i<n; n.add(BigInteger.ONE)) // Error : -- and >= can not be applied to java.math.BigInteger
{

int ctr=0;
for(x =i; x>=1; x--) // Error : -- and >= can not be applied to java.math.BigInteger
{
if(i%x==0) //Error : % can not be applied to java.math.BigInteger
{
ctr = ctr + 1;
}
}
if (ctr ==2)
{
System.out.print(" " + i);
}

}

Any solution to this?

[Luuk]

Out of pure interest, i google for the answer ;)
it seems to be here: http://stackoverflow.com/questions/1...use-biginteger

There is a long way to go before you hit the jackpot:

http://www.reuters.com/article/2013/02/08/us-usa-science-primenumber-idUSBRE9170UO20130208